def adaline_implementation(targets_train, targets_test, patterns_train,
patterns_test, plot, d3):
a = Adaline()
max_epochs = int(input('Μέγιστος αριθμός εποχών: '))
learning_rate = float(input('Ρυθμός εκμάθησης: '))
min_mse = float(input('Ελάχιστο σφάλμα: '))
weights = a.train(max_epochs, patterns_train,
targets_train, learning_rate, min_mse, plot, d3)
# if plot == False:
guesses = a.test(weights, patterns_test, targets_test)
a.plot_accuracy(targets_test, guesses)
def adaline_helper(data, label=None, eta=0.005, multi=False, iterations=1):
if label == None:
label = class_label
f = 5 # fold-value
# tracker variables for performance/timing
perf = []
# get starting attrs for building tree
tune = data['tune']
attrs = tune.drop(columns=[label]).columns.values
print('\n======== ADALINE ========')
print('eta:\t\t', eta)
print('iterations:\t', iterations)
print()
for i in range(f):
print('\n>> FOLD #{0}'.format(i + 1))
folds = data['folds'].copy()
holdout = folds[i]
folds.pop(i) # remove holdout fold
training = pd.concat(
folds) # concat remaining folds to create training set
accuracy = 0
# build adaline model, depending on whether there are multiple classes (k > 2) or not
if (multi):
ada = Adaline(label, eta, iterations)
w_map = ada.build(training)
accuracy_map = ada.test_multi_class_helper(holdout, w_map)
# grab the accuracies (values) per class and sum them for total accuracy
accuracy_sum = np.sum(list(accuracy_map.values()))
# divide by number of class options (keys) to determine average accuracy
# for the multi-class scenario
accuracy = accuracy_sum / (len(accuracy_map.keys()))
else:
ada = Adaline(label, eta, iterations)
w_map = ada.build(training)
accuracy = ada.test(holdout, w_map['main'])
# track results
perf.append(accuracy)
print('accuracy:\t{:.0%}'.format(accuracy))
print('------------')
print('\n---- ADALINE SUMMARY ----')
print_helper_classifier(perf, f)
trainIndexes, testIndexes = separateIndexesByRatio(2 * nSamplesPerGroup,
trainSamplesRatio)
random.shuffle(trainIndexes)
# %% Initialize and Train Adaline
adaline = Adaline([0] * (adalineDimension), 0.1, lambda x: 1 if x >= 0 else -1)
xTrain = inputData[trainIndexes]
yTrain = outputData[trainIndexes]
adaline.train(xTrain, yTrain, tol, maxIterations)
# %% Test
xTest = inputData[testIndexes]
yTest = outputData[testIndexes]
testResult = adaline.test(xTest, yTest)
print(f"Mean Squared Error: {testResult}")
# %% Plot
adalineApproxYArr = adaline.evaluate(inputData)
weights = adaline.getWeights()
def hyperPlan(x):
return -(weights[0] * x + weights[2]) / weights[1]
xPlan = np.linspace(0.5, 5.5, 100)
yPlan = np.vectorize(hyperPlan)(xPlan)
